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| Orbital characteristics [ftp://ftp.lowell.edu/pub/elgb/astorb.html 1] | |
|---|---|
| Orbit type | Main belt |
| Semimajor axis | 3.121 AU |
| Perihelion distance | 2.483 AU |
| Aphelion distance | 3.759 AU |
| Orbital period | 5.51 years |
| Inclination | 4.80° |
| Eccentricity | 0.204 |
| Physical characteristics [ftp://ftp.lowell.edu/pub/elgb/astorb.html 1] | |
| Diameter | 120.6 km |
| Rotation period | 16.634 hours |
| Spectral class | C |
| Abs. magnitude | 8.54 |
| Albedo | 0.044 |
| History | |
| Discoverer | F. Tietjen, 1866 |
86 Semele is a large and very dark main belt asteroid. It is probably composed of carbonates.
Semele was discovered by German astronomer Friedrich Tietjen on January 4, 1866. It was his first and only asteroid discovery. It is named after Semele, the mother of Dionysus in Greek mythology.
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